Well all I can say is that whether you like it or not rock music is proven to negatively change the neuron structure in your brain, they have not done many tests on the effect to your behaviors from this. we haven't had this sort of music around enough to fully study its effect's on society so you can't rule anything out. all I can say is that if your neurons are under stress from the music it is a Negative thing.

How is rock music negative? Calling something negative is matter of opinion.